Wireless communication including xr traffic awareness

ABSTRACT

A configuration to allow a base station to be synchronized with an application server to enable the base station to align uplink transmissions of a UE with downlink reception periods of the UE. The base station communicates with a UE using periodic uplink traffic bursts and periodic downlink traffic bursts. The base station selects a time offset to at least one of uplink traffic or downlink traffic to increase an overlap between the uplink traffic bursts and the downlink traffic bursts. The base station sends the time offset to an AF.

CLAIM OF PRIORITY UNDER 35.U.S.C. § 120

The present Application for Patent is a continuation of U.S.Non-Provisional Application No. 16/903,312 by HANDE et al., entitled“WIRELESS COMMUNICATION INCLUDING XR TRAFFIC AWARENESS”, filed Jun. 16,2020, which claims the benefit of U.S. Provisional Application Ser. No.62/865,849, entitled “WIRELESS COMMUNICATION INCLUDING XR TRAFFICAWARENESS” filed on Jun. 24, 2019, assigned to the assignee hereof, andexpressly incorporated by reference herein.

BACKGROUND Technical Field

The present disclosure relates generally to communication systems, andmore particularly, to wireless communication associated with extendedreality (XR) traffic.

Introduction

Wireless communication systems are widely deployed to provide varioustelecommunication services such as telephony, video, data, messaging,and broadcasts. Typical wireless communication systems may employmultiple-access technologies capable of supporting communication withmultiple users by sharing available system resources. Examples of suchmultiple-access technologies include code division multiple access(CDMA) systems, time division multiple access (TDMA) systems, frequencydivision multiple access (FDMA) systems, orthogonal frequency divisionmultiple access (OFDMA) systems, single-carrier frequency divisionmultiple access (SC-FDMA) systems, and time division synchronous codedivision multiple access (TD-SCDMA) systems.

These multiple access technologies have been adopted in varioustelecommunication standards to provide a common protocol that enablesdifferent wireless devices to communicate on a municipal, national,regional, and even global level. An example telecommunication standardis 5G New Radio (NR). 5G NR is part of a continuous mobile broadbandevolution promulgated by Third Generation Partnership Project (3GPP) tomeet new requirements associated with latency, reliability, security,scalability (e.g., with Internet of Things (IoT)), and otherrequirements. 5G NR includes services associated with enhanced mobilebroadband (eMBB), massive machine type communications (mMTC), andultra-reliable low latency communications (URLLC). Some aspects of 5G NRmay be based on the 4G Long Term Evolution (LTE) standard. There existsa need for further improvements in 5G NR technology. These improvementsmay also be applicable to other multi-access technologies and thetelecommunication standards that employ these technologies.

SUMMARY

The following presents a simplified summary of one or more aspects inorder to provide a basic understanding of such aspects. This summary isnot an extensive overview of all contemplated aspects, and is intendedto neither identify key or critical elements of all aspects nordelineate the scope of any or all aspects. Its sole purpose is topresent some concepts of one or more aspects in a simplified form as aprelude to the more detailed description that is presented later.

Extended reality (XR) may be used for different applications. XR mayinvolve real and virtual combined environments and human-machineinteractions generated by computer technology and wearables, forexample. As an example, XR communication may be used for cloud gaming,virtual reality (VR) split rendering, and/or augmented reality (AR)split computation. XR communications may occur over a 5G NR system, inconjunction with an edge server. For example, a UE may receive XR data,which the UE may transmit to a base station, wherein the base stationmay provide the XR data to the core network. The core network mayinterface with the edge server and provide the XR data to the edgeserver. However, the 5G system and the edge server may be based onindependent clocks, such that computation and communication might not becoordinated. The present disclosure allows for the 5G system and theedge server to be synchronized in order to improve and coordinatecomputation and communication.

In an aspect of the disclosure, a method, a computer-readable medium,and an apparatus are provided. The apparatus may be a device at a basestation. The device may be a processor and/or a modem at a base stationor the base station itself. The apparatus communicates with a userequipment (UE) using periodic uplink traffic bursts and periodicdownlink traffic bursts. The apparatus selects a time offset to at leastone of uplink traffic or downlink traffic to increase an overlap betweenthe uplink traffic bursts and the downlink traffic bursts. The apparatussend the time offset to an application function (AF).

In an aspect of the disclosure, a method, a computer-readable medium,and an apparatus are provided. The apparatus may be a device at a UE.The device may be a processor and/or a modem at a UE or the UE itself.The apparatus communicates with a base station using periodic uplinktraffic bursts and periodic downlink traffic bursts. The apparatusconfiguring a discontinuous reception (DRX) cycle based on the periodicuplink and downlink traffic bursts, wherein uplink transmission aregrant based. The apparatus delays sending a scheduling request (SR) foruplink traffic to a beginning of a next DRX cycle.

In an aspect of the disclosure, a method, a computer-readable medium,and an apparatus are provided. The apparatus may be a device at a UE.The device may be a processor and/or a modem at a UE or the UE itself.The apparatus communicates with a base station using periodic uplinktraffic bursts and periodic downlink traffic bursts. The apparatusreceives a configuration of a DRX cycle based on the periodic uplink anddownlink traffic bursts, wherein uplink transmission are grant based.The apparatus transmits a scheduling request (SR) prior to an arrival ofthe uplink traffic when the arrival of uplink traffic burst is expectedto arrive within the next DRX cycle.

To the accomplishment of the foregoing and related ends, the one or moreaspects comprise the features hereinafter fully described andparticularly pointed out in the claims. The following description andthe annexed drawings set forth in detail certain illustrative featuresof the one or more aspects. These features are indicative, however, ofbut a few of the various ways in which the principles of various aspectsmay be employed, and this description is intended to include all suchaspects and their equivalents.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a diagram illustrating an example of a wireless communicationssystem and an access network.

FIGS. 2A, 2B, 2C, and 2D are diagrams illustrating examples of a first5G NR frame, DL channels within a 5G NR subframe, a second 5G NR frame,and UL channels within a 5G NR subframe, respectively.

FIG. 3 is a diagram illustrating an example of a base station and userequipment (UE) in an access network.

FIG. 4 is a diagram illustrating XR over a 5G system.

FIG. 5A is a diagram illustrating a timeline of XR withoutsynchronization.

FIG. 5B is a diagram illustrating a periodic or quasi-periodic nature ofXR traffic.

FIG. 6 is a diagram illustrating an edge server synchronized with a 5Gsystem in accordance with certain aspects of the disclosure.

FIGS. 7A-7B illustrate diagrams of an edge server and a 5G system inaccordance with certain aspects of the disclosure.

FIGS. 8A-8B illustrate diagrams of aligning uplink transmissions withdownlink reception periods in accordance with certain aspects of thedisclosure.

FIG. 9 is a call flow diagram of signaling between a UE and a basestation in accordance with certain aspects of the disclosure.

FIG. 10 is a flowchart of a method of wireless communication.

FIG. 11 is a diagram illustrating an example of a hardwareimplementation for an apparatus employing a processing system.

FIG. 12 is a flowchart of a method of wireless communication.

FIG. 13 is a flowchart of a method of wireless communication.

FIG. 14 is a flowchart of a method of wireless communication.

FIG. 15 is a flowchart of a method of wireless communication.

FIG. 16 is a flowchart of a method of wireless communication.

FIG. 17 is a diagram illustrating an example of a hardwareimplementation for an apparatus employing a processing system.

DETAILED DESCRIPTION

The detailed description set forth below in connection with the appendeddrawings is intended as a description of various configurations and isnot intended to represent the only configurations in which the conceptsdescribed herein may be practiced. The detailed description includesspecific details for the purpose of providing a thorough understandingof various concepts. However, it will be apparent to those skilled inthe art that these concepts may be practiced without these specificdetails. In some instances, well known structures and components areshown in block diagram form in order to avoid obscuring such concepts.

Several aspects of telecommunication systems will now be presented withreference to various apparatus and methods. These apparatus and methodswill be described in the following detailed description and illustratedin the accompanying drawings by various blocks, components, circuits,processes, algorithms, etc. (collectively referred to as “elements”).These elements may be implemented using electronic hardware, computersoftware, or any combination thereof. Whether such elements areimplemented as hardware or software depends upon the particularapplication and design constraints imposed on the overall system.

By way of example, an element, or any portion of an element, or anycombination of elements may be implemented as a “processing system” thatincludes one or more processors. Examples of processors includemicroprocessors, microcontrollers, graphics processing units (GPUs),central processing units (CPUs), application processors, digital signalprocessors (DSPs), reduced instruction set computing (RISC) processors,systems on a chip (SoC), baseband processors, field programmable gatearrays (FPGAs), programmable logic devices (PLDs), state machines, gatedlogic, discrete hardware circuits, and other suitable hardwareconfigured to perform the various functionality described throughoutthis disclosure. One or more processors in the processing system mayexecute software. Software shall be construed broadly to meaninstructions, instruction sets, code, code segments, program code,programs, subprograms, software components, applications, softwareapplications, software packages, routines, subroutines, objects,executables, threads of execution, procedures, functions, etc., whetherreferred to as software, firmware, middleware, microcode, hardwaredescription language, or otherwise.

Accordingly, in one or more example embodiments, the functions describedmay be implemented in hardware, software, or any combination thereof. Ifimplemented in software, the functions may be stored on or encoded asone or more instructions or code on a computer-readable medium.Computer-readable media includes computer storage media. Storage mediamay be any available media that can be accessed by a computer. By way ofexample, and not limitation, such computer-readable media can comprise arandom-access memory (RAM), a read-only memory (ROM), an electricallyerasable programmable ROM (EEPROM), optical disk storage, magnetic diskstorage, other magnetic storage devices, combinations of theaforementioned types of computer-readable media, or any other mediumthat can be used to store computer executable code in the form ofinstructions or data structures that can be accessed by a computer.

FIG. 1 is a diagram illustrating an example of a wireless communicationssystem and an access network 100. The wireless communications system(also referred to as a wireless wide area network (WWAN)) includes basestations 102, UEs 104, an Evolved Packet Core (EPC) 160, and anothercore network 190 (e.g., a 5G Core (5GC)). The base stations 102 mayinclude macrocells (high power cellular base station) and/or small cells(low power cellular base station). The macrocells include base stations.The small cells include femtocells, picocells, and microcells.

The base stations 102 configured for 4G LTE (collectively referred to asEvolved Universal Mobile Telecommunications System (UMTS) TerrestrialRadio Access Network (E-UTRAN)) may interface with the EPC 160 throughfirst backhaul links 132 (e.g., S1 interface). The base stations 102configured for 5G NR (collectively referred to as Next Generation RAN(NG-RAN)) may interface with core network 190 through second backhaullinks 184. In addition to other functions, the base stations 102 mayperform one or more of the following functions: transfer of user data,radio channel ciphering and deciphering, integrity protection, headercompression, mobility control functions (e.g., handover, dualconnectivity), inter-cell interference coordination, connection setupand release, load balancing, distribution for non-access stratum (NAS)messages, NAS node selection, synchronization, radio access network(RAN) sharing, multimedia broadcast multicast service (MBMS), subscriberand equipment trace, RAN information management (RIM), paging,positioning, and delivery of warning messages. The base stations 102 maycommunicate directly or indirectly (e.g., through the EPC 160 or corenetwork 190) with each other over third backhaul links 134 (e.g., X2interface). The first backhaul links 132, the second backhaul links 184,and the third backhaul links 134 may be wired or wireless.

The base stations 102 may wirelessly communicate with the UEs 104. Eachof the base stations 102 may provide communication coverage for arespective geographic coverage area 110. There may be overlappinggeographic coverage areas 110. For example, the small cell 102′ may havea coverage area 110′ that overlaps the coverage area 110 of one or moremacro base stations 102. A network that includes both small cell andmacrocells may be known as a heterogeneous network. A heterogeneousnetwork may also include Home Evolved Node Bs (eNBs) (HeNBs), which mayprovide service to a restricted group known as a closed subscriber group(CSG). The communication links 120 between the base stations 102 and theUEs 104 may include uplink (UL) (also referred to as reverse link)transmissions from a UE 104 to a base station 102 and/or downlink (DL)(also referred to as forward link) transmissions from a base station 102to a UE 104. The communication links 120 may use multiple-input andmultiple-output (MIMO) antenna technology, including spatialmultiplexing, beamforming, and/or transmit diversity. The communicationlinks may be through one or more carriers. The base stations 102/UEs 104may use spectrum up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc. MHz)bandwidth per carrier allocated in a carrier aggregation of up to atotal of Yx MHz (x component carriers) used for transmission in eachdirection. The carriers may or may not be adjacent to each other.Allocation of carriers may be asymmetric with respect to DL and UL(e.g., more or fewer carriers may be allocated for DL than for UL). Thecomponent carriers may include a primary component carrier and one ormore secondary component carriers. A primary component carrier may bereferred to as a primary cell (PCell) and a secondary component carriermay be referred to as a secondary cell (SCell).

Certain UEs 104 may communicate with each other using device-to-device(D2D) communication link 158. The D2D communication link 158 may use theDL/UL WWAN spectrum. The D2D communication link 158 may use one or moresidelink channels, such as a physical sidelink broadcast channel(PSBCH), a physical sidelink discovery channel (PSDCH), a physicalsidelink shared channel (PSSCH), and a physical sidelink control channel(PSCCH). D2D communication may be through a variety of wireless D2Dcommunications systems, such as for example, WiMedia, Bluetooth, ZigBee,Wi-Fi based on the Institute of Electrical and Electronics Engineers(IEEE) 802.11 standard, LTE, or NR.

The wireless communications system may further include a Wi-Fi accesspoint (AP) 150 in communication with Wi-Fi stations (STAs) 152 viacommunication links 154 in a 5 GHz unlicensed frequency spectrum. Whencommunicating in an unlicensed frequency spectrum, the STAs 152/AP 150may perform a clear channel assessment (CCA) prior to communicating inorder to determine whether the channel is available.

The small cell 102′ may operate in a licensed and/or an unlicensedfrequency spectrum. When operating in an unlicensed frequency spectrum,the small cell 102′ may employ NR and use the same 5 GHz unlicensedfrequency spectrum as used by the Wi-Fi AP 150. The small cell 102′,employing NR in an unlicensed frequency spectrum, may boost coverage toand/or increase capacity of the access network.

A base station 102, whether a small cell 102′ or a large cell (e.g.,macro base station), may include and/or be referred to as an eNB, gNodeB(gNB), or another type of base station. Some base stations, such as gNB180 may operate in a traditional sub 6 GHz spectrum, in millimeter wave(mmW) frequencies, and/or near mmW frequencies in communication with theUE 104. When the gNB 180 operates in mmW or near mmW frequencies, thegNB 180 may be referred to as an mmW base station. Extremely highfrequency (EHF) is part of the RF in the electromagnetic spectrum. EHFhas a range of 30 GHz to 300 GHz and a wavelength between 1 millimeterand 10 millimeters. Radio waves in the band may be referred to as amillimeter wave. Near mmW may extend down to a frequency of 3 GHz with awavelength of 100 millimeters. The super high frequency (SHF) bandextends between 3 GHz and 30 GHz, also referred to as centimeter wave.Frequency range bands include frequency range 1 (FR1), which includesfrequency bands below 7.225 GHz, and frequency range 2 (FR2), whichincludes frequency bands above 24.250 GHz. Communications using themmW/near mmW radio frequency (RF) band (e.g., 3 GHz-300 GHz) hasextremely high path loss and a short range. Base stations/UEs mayoperate within one or more frequency range bands. The mmW base station180 may utilize beamforming 182 with the UE 104 to compensate for theextremely high path loss and short range. The base station 180 and theUE 104 may each include a plurality of antennas, such as antennaelements, antenna panels, and/or antenna arrays to facilitate thebeamforming.

The base station 180 may transmit a beamformed signal to the UE 104 inone or more transmit directions 182′. The UE 104 may receive thebeamformed signal from the base station 180 in one or more receivedirections 182″. The UE 104 may also transmit a beamformed signal to thebase station 180 in one or more transmit directions. The base station180 may receive the beamformed signal from the UE 104 in one or morereceive directions. The base station 180/UE 104 may perform beamtraining to determine the best receive and transmit directions for eachof the base station 180/UE 104. The transmit and receive directions forthe base station 180 may or may not be the same. The transmit andreceive directions for the UE 104 may or may not be the same.

The EPC 160 may include a Mobility Management Entity (MME) 162, otherMMEs 164, a Serving Gateway 166, a Multimedia Broadcast MulticastService (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC)170, and a Packet Data Network (PDN) Gateway 172. The MME 162 may be incommunication with a Home Subscriber Server (HSS) 174. The MME 162 isthe control node that processes the signaling between the UEs 104 andthe EPC 160. Generally, the MME 162 provides bearer and connectionmanagement. All user Internet protocol (IP) packets are transferredthrough the Serving Gateway 166, which itself is connected to the PDNGateway 172. The PDN Gateway 172 provides UE IP address allocation aswell as other functions. The PDN Gateway 172 and the BM-SC 170 areconnected to the IP Services 176. The IP Services 176 may include theInternet, an intranet, an IP Multimedia Subsystem (IMS), a PS StreamingService, and/or other IP services. The BM-SC 170 may provide functionsfor MBMS user service provisioning and delivery. The BM-SC 170 may serveas an entry point for content provider MBMS transmission, may be used toauthorize and initiate MBMS Bearer Services within a public land mobilenetwork (PLMN), and may be used to schedule MBMS transmissions. The MBMSGateway 168 may be used to distribute MBMS traffic to the base stations102 belonging to a Multicast Broadcast Single Frequency Network (MBSFN)area broadcasting a particular service, and may be responsible forsession management (start/stop) and for collecting eMBMS relatedcharging information.

The core network 190 may include a Access and Mobility ManagementFunction (AMF) 192, other AMFs 193, a Session Management Function (SMF)194, and a User Plane Function (UPF) 195. The AMF 192 may be incommunication with a Unified Data Management (UDM) 196. The AMF 192 isthe control node that processes the signaling between the UEs 104 andthe core network 190. Generally, the AMF 192 provides QoS flow andsession management. All user Internet protocol (IP) packets aretransferred through the UPF 195. The UPF 195 provides UE IP addressallocation as well as other functions. The UPF 195 is connected to theIP Services 197. The IP Services 197 may include the Internet, anintranet, an IP Multimedia Subsystem (IMS), a Packet Switch (PS)Streaming (PSS) Service, and/or other IP services.

The base station may include and/or be referred to as a gNB, Node B,eNB, an access point, a base transceiver station, a radio base station,a radio transceiver, a transceiver function, a basic service set (BSS),an extended service set (ESS), a transmit reception point (TRP), or someother suitable terminology. The base station 102 provides an accesspoint to the EPC 160 or core network 190 for a UE 104. Examples of UEs104 include a cellular phone, a smart phone, a session initiationprotocol (SIP) phone, a laptop, a personal digital assistant (PDA), asatellite radio, a global positioning system, a multimedia device, avideo device, a digital audio player (e.g., MP3 player), a camera, agame console, a tablet, a smart device, a wearable device, a vehicle, anelectric meter, a gas pump, a large or small kitchen appliance, ahealthcare device, an implant, a sensor/actuator, a display, or anyother similar functioning device. Some of the UEs 104 may be referred toas IoT devices (e.g., parking meter, gas pump, toaster, vehicles, heartmonitor, etc.). The UE 104 may also be referred to as a station, amobile station, a subscriber station, a mobile unit, a subscriber unit,a wireless unit, a remote unit, a mobile device, a wireless device, awireless communications device, a remote device, a mobile subscriberstation, an access terminal, a mobile terminal, a wireless terminal, aremote terminal, a handset, a user agent, a mobile client, a client, orsome other suitable terminology.

Referring again to FIG. 1 , in certain aspects, the base station 180 maybe configured to align the uplink transmissions and downlink receptionsfor UEs. For example, the base station 180 of FIG. 1 may include anoffset time component 198 configured to select an offset time fortransmitting a periodic downlink traffic burst to a UE based on aprocessing timeline associated with an application server. The basestation 180 may communicate with a UE using periodic uplink trafficbursts and periodic downlink traffic bursts. The base station 180 mayselect a time offset to at least one of uplink traffic or downlinktraffic to increase an overlap between the uplink traffic bursts and thedownlink traffic bursts. The base station 180 may send the time offsetto an application function (AF).

Referring again to FIG. 1 , in certain aspects, the UE 104 may beconfigured to adjust it uplink transmissions in order to be synchronizedwith a processing timeline associated with an application server. Forexample, the UE 104 of FIG. 1 may include a synchronization component199 configured to adjust periodic uplink traffic bursts from the UEbased on an offset, such that the UE is synchronized with the processingtimeline.

Although the following description may be focused on 5G NR, the conceptsdescribed herein may be applicable to other similar areas, such as LTE,LTE-A, CDMA, GSM, and other wireless technologies.

FIG. 2A is a diagram 200 illustrating an example of a first subframewithin a 5G NR frame structure. FIG. 2B is a diagram 230 illustrating anexample of DL channels within a 5G NR subframe. FIG. 2C is a diagram 250illustrating an example of a second subframe within a 5G NR framestructure. FIG. 2D is a diagram 280 illustrating an example of ULchannels within a 5G NR subframe. The 5G NR frame structure may befrequency division duplexed (FDD) in which for a particular set ofsubcarriers (carrier system bandwidth), subframes within the set ofsubcarriers are dedicated for either DL or UL, or may be time divisionduplexed (TDD) in which for a particular set of subcarriers (carriersystem bandwidth), subframes within the set of subcarriers are dedicatedfor both DL and UL. In the examples provided by FIGS. 2A, 2C, the 5G NRframe structure is assumed to be TDD, with subframe 4 being configuredwith slot format 28 (with mostly DL), where D is DL, U is UL, and F isflexible for use between DL/UL, and subframe 3 being configured withslot format 34 (with mostly UL). While subframes 3, 4 are shown withslot formats 34, 28, respectively, any particular subframe may beconfigured with any of the various available slot formats 0-61. Slotformats 0, 1 are all DL, UL, respectively. Other slot formats 2-61include a mix of DL, UL, and flexible symbols. UEs are configured withthe slot format (dynamically through DL control information (DCI), orsemi-statically/statically through radio resource control (RRC)signaling) through a received slot format indicator (SFI). Note that thedescription infra applies also to a 5G NR frame structure that is TDD.

Other wireless communication technologies may have a different framestructure and/or different channels. A frame (10 ms) may be divided into10 equally sized subframes (1 ms). Each subframe may include one or moretime slots. Subframes may also include mini-slots, which may include 7,4, or 2 symbols. Each slot may include 7 or 14 symbols, depending on theslot configuration. For slot configuration 0, each slot may include 14symbols, and for slot configuration 1, each slot may include 7 symbols.The symbols on DL may be cyclic prefix (CP) OFDM (CP-OFDM) symbols. Thesymbols on UL may be CP-OFDM symbols (for high throughput scenarios) ordiscrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (alsoreferred to as single carrier frequency-division multiple access(SC-FDMA) symbols) (for power limited scenarios; limited to a singlestream transmission). The number of slots within a subframe is based onthe slot configuration and the numerology. For slot configuration 0,different numerologies μ 0 to 4 allow for 1, 2, 4, 8, and 16 slots,respectively, per subframe. For slot configuration 1, differentnumerologies 0 to 2 allow for 2, 4, and 8 slots, respectively, persubframe. Accordingly, for slot configuration 0 and numerology μ, thereare 14 symbols/slot and 2^(μ) slots/subframe. The subcarrier spacing andsymbol length/duration are a function of the numerology. The subcarrierspacing may be equal to 2^(μ)* 15 kHz, where μ is the numerology 0 to 4.As such, the numerology μ=0 has a subcarrier spacing of 15 kHz and thenumerology μ=4 has a subcarrier spacing of 240 kHz. The symbollength/duration is inversely related to the subcarrier spacing. FIGS.2A-2D provide an example of slot configuration 0 with 14 symbols perslot and numerology μ=2 with 4 slots per subframe. The slot duration is0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration isapproximately 16.67 μs. Within a set of frames, there may be one or moredifferent bandwidth parts (BWPs) (see FIG. 2B) that are frequencydivision multiplexed. Each BWP may have a particular numerology.

A resource grid may be used to represent the frame structure. Each timeslot includes a resource block (RB) (also referred to as physical RBs(PRBs)) that extends 12 consecutive subcarriers. The resource grid isdivided into multiple resource elements (REs). The number of bitscarried by each RE depends on the modulation scheme.

As illustrated in FIG. 2A, some of the REs carry reference (pilot)signals (RS) for the UE. The RS may include demodulation RS (DM-RS)(indicated as R_(x) for one particular configuration, where 100×is theport number, but other DM-RS configurations are possible) and channelstate information reference signals (CSI-RS) for channel estimation atthe UE. The RS may also include beam measurement RS (BRS), beamrefinement RS (BRRS), and phase tracking RS (PT-RS).

FIG. 2B illustrates an example of various DL channels within a subframeof a frame. The physical downlink control channel (PDCCH) carries DCIwithin one or more control channel elements (CCEs), each CCE includingnine RE groups (REGs), each REG including four consecutive REs in anOFDM symbol. A PDCCH within one BWP may be referred to as a controlresource set (CORESET). Additional BWPs may be located at greater and/orlower frequencies across the channel bandwidth. A primarysynchronization signal (PSS) may be within symbol 2 of particularsubframes of a frame. The PSS is used by a UE 104 to determinesubframe/symbol timing and a physical layer identity. A secondarysynchronization signal (SSS) may be within symbol 4 of particularsubframes of a frame. The SSS is used by a UE to determine a physicallayer cell identity group number and radio frame timing. Based on thephysical layer identity and the physical layer cell identity groupnumber, the UE can determine a physical cell identifier (PCI). Based onthe PCI, the UE can determine the locations of the aforementioned DM-RS.The physical broadcast channel (PBCH), which carries a masterinformation block (MIB), may be logically grouped with the PSS and SSSto form a synchronization signal (SS)/PBCH block (also referred to as SSblock (SSB)). The MIB provides a number of RBs in the system bandwidthand a system frame number (SFN). The physical downlink shared channel(PDSCH) carries user data, broadcast system information not transmittedthrough the PBCH such as system information blocks (SIBs), and pagingmessages.

As illustrated in FIG. 2C, some of the REs carry DM-RS (indicated as Rfor one particular configuration, but other DM-RS configurations arepossible) for channel estimation at the base station. The UE maytransmit DM-RS for the physical uplink control channel (PUCCH) and DM-RSfor the physical uplink shared channel (PUSCH). The PUSCH DM-RS may betransmitted in the first one or two symbols of the PUSCH. The PUCCHDM-RS may be transmitted in different configurations depending onwhether short or long PUCCHs are transmitted and depending on theparticular PUCCH format used. The UE may transmit sounding referencesignals (SRS). The SRS may be transmitted in the last symbol of asubframe. The SRS may have a comb structure, and a UE may transmit SRSon one of the combs. The SRS may be used by a base station for channelquality estimation to enable frequency-dependent scheduling on the UL.

FIG. 2D illustrates an example of various UL channels within a subframeof a frame. The PUCCH may be located as indicated in one configuration.The PUCCH carries uplink control information (UCI), such as schedulingrequests, a channel quality indicator (CQI), a precoding matrixindicator (PMI), a rank indicator (RI), and hybrid automatic repeatrequest (HARQ) ACK/NACK feedback. The PUSCH carries data, and mayadditionally be used to carry a buffer status report (BSR), a powerheadroom report (PHR), and/or UCI.

FIG. 3 is a block diagram of a base station 310 in communication with aUE 350 in an access network. In the DL, IP packets from the EPC 160 maybe provided to a controller/processor 375. The controller/processor 375implements layer 3 and layer 2 functionality. Layer 3 includes a radioresource control (RRC) layer, and layer 2 includes a service dataadaptation protocol (SDAP) layer, a packet data convergence protocol(PDCP) layer, a radio link control (RLC) layer, and a medium accesscontrol (MAC) layer. The controller/processor 375 provides RRC layerfunctionality associated with broadcasting of system information (e.g.,MIB, SIBs), RRC connection control (e.g., RRC connection paging, RRCconnection establishment, RRC connection modification, and RRCconnection release), inter radio access technology (RAT) mobility, andmeasurement configuration for UE measurement reporting; PDCP layerfunctionality associated with header compression/decompression, security(ciphering, deciphering, integrity protection, integrity verification),and handover support functions; RLC layer functionality associated withthe transfer of upper layer packet data units (PDUs), error correctionthrough ARQ, concatenation, segmentation, and reassembly of RLC servicedata units (SDUs), re-segmentation of RLC data PDUs, and reordering ofRLC data PDUs; and MAC layer functionality associated with mappingbetween logical channels and transport channels, multiplexing of MACSDUs onto transport blocks (TBs), demultiplexing of MAC SDUs from TBs,scheduling information reporting, error correction through HARQ,priority handling, and logical channel prioritization.

The transmit (TX) processor 316 and the receive (RX) processor 370implement layer 1 functionality associated with various signalprocessing functions. Layer 1, which includes a physical (PHY) layer,may include error detection on the transport channels, forward errorcorrection (FEC) coding/decoding of the transport channels,interleaving, rate matching, mapping onto physical channels,modulation/demodulation of physical channels, and MIMO antennaprocessing. The TX processor 316 handles mapping to signalconstellations based on various modulation schemes (e.g., binaryphase-shift keying (BPSK), quadrature phase-shift keying (QPSK),M-phase-shift keying (M-PSK), M-quadrature amplitude modulation(M-QAM)). The coded and modulated symbols may then be split intoparallel streams. Each stream may then be mapped to an OFDM subcarrier,multiplexed with a reference signal (e.g., pilot) in the time and/orfrequency domain, and then combined together using an Inverse FastFourier Transform (IFFT) to produce a physical channel carrying a timedomain OFDM symbol stream. The OFDM stream is spatially precoded toproduce multiple spatial streams. Channel estimates from a channelestimator 374 may be used to determine the coding and modulation scheme,as well as for spatial processing. The channel estimate may be derivedfrom a reference signal and/or channel condition feedback transmitted bythe UE 350. Each spatial stream may then be provided to a differentantenna 320 via a separate transmitter 318TX. Each transmitter 318TX maymodulate an RF carrier with a respective spatial stream fortransmission.

At the UE 350, each receiver 354RX receives a signal through itsrespective antenna 352. Each receiver 354RX recovers informationmodulated onto an RF carrier and provides the information to the receive(RX) processor 356. The TX processor 368 and the RX processor 356implement layer 1 functionality associated with various signalprocessing functions. The RX processor 356 may perform spatialprocessing on the information to recover any spatial streams destinedfor the UE 350. If multiple spatial streams are destined for the UE 350,they may be combined by the RX processor 356 into a single OFDM symbolstream. The RX processor 356 then converts the OFDM symbol stream fromthe time-domain to the frequency domain using a Fast Fourier Transform(FFT). The frequency domain signal comprises a separate OFDM symbolstream for each subcarrier of the OFDM signal. The symbols on eachsubcarrier, and the reference signal, are recovered and demodulated bydetermining the most likely signal constellation points transmitted bythe base station 310. These soft decisions may be based on channelestimates computed by the channel estimator 358. The soft decisions arethen decoded and deinterleaved to recover the data and control signalsthat were originally transmitted by the base station 310 on the physicalchannel. The data and control signals are then provided to thecontroller/processor 359, which implements layer 3 and layer 2functionality.

The controller/processor 359 can be associated with a memory 360 thatstores program codes and data. The memory 360 may be referred to as acomputer-readable medium. In the UL, the controller/processor 359provides demultiplexing between transport and logical channels, packetreassembly, deciphering, header decompression, and control signalprocessing to recover IP packets from the EPC 160. Thecontroller/processor 359 is also responsible for error detection usingan ACK and/or NACK protocol to support HARQ operations.

Similar to the functionality described in connection with the DLtransmission by the base station 310, the controller/processor 359provides RRC layer functionality associated with system information(e.g., MIB, SIBs) acquisition, RRC connections, and measurementreporting; PDCP layer functionality associated with headercompression/decompression, and security (ciphering, deciphering,integrity protection, integrity verification); RLC layer functionalityassociated with the transfer of upper layer PDUs, error correctionthrough ARQ, concatenation, segmentation, and reassembly of RLC SDUs,re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; andMAC layer functionality associated with mapping between logical channelsand transport channels, multiplexing of MAC SDUs onto TBs,demultiplexing of MAC SDUs from TBs, scheduling information reporting,error correction through HARQ, priority handling, and logical channelprioritization.

Channel estimates derived by a channel estimator 358 from a referencesignal or feedback transmitted by the base station 310 may be used bythe TX processor 368 to select the appropriate coding and modulationschemes, and to facilitate spatial processing. The spatial streamsgenerated by the TX processor 368 may be provided to different antenna352 via separate transmitters 354TX. Each transmitter 354TX may modulatean RF carrier with a respective spatial stream for transmission.

The UL transmission is processed at the base station 310 in a mannersimilar to that described in connection with the receiver function atthe UE 350. Each receiver 318RX receives a signal through its respectiveantenna 320. Each receiver 318RX recovers information modulated onto anRF carrier and provides the information to a RX processor 370.

The controller/processor 375 can be associated with a memory 376 thatstores program codes and data. The memory 376 may be referred to as acomputer-readable medium. In the UL, the controller/processor 375provides demultiplexing between transport and logical channels, packetreassembly, deciphering, header decompression, control signal processingto recover IP packets from the UE 350. IP packets from thecontroller/processor 375 may be provided to the EPC 160. Thecontroller/processor 375 is also responsible for error detection usingan ACK and/or NACK protocol to support HARQ operations.

At least one of the TX processor 368, the RX processor 356, and thecontroller/processor 359 may be configured to perform aspects inconnection with 199 of FIG. 1 .

At least one of the TX processor 316, the RX processor 370, and thecontroller/processor 375 may be configured to perform aspects inconnection with 198 of FIG. 1 .

Table 1 illustrates examples of QoS parameters for different types ofcommunications. The table indicates a 5G QoS indicator (5QI) value for acorresponding packet delay budget (PDB), packet error rate (PER),default maximum data burst (MDB) volume, and example services for the5QI value. The examples shown for 5QI values 1, 2, 6, 8, and 9 maycorrespond to eMBB uses cases. The examples for eMBB may correspond tovarious different types of traffic. The example shown for 5QI value 80may correspond to an XR use case, and the example shown for 5QI value 81may correspond to an URLLC use case. URLLC may have a very low latency,e.g., a PDB≤5 ms, and a high reliability, e.g., a PER≤10⁻⁵, for low datarate traffic. XR communication may have a high reliability, e.g., aPER≤10⁻³, and a low latency, e.g., a PDB in the range of 5 ms≤PDB≤25 ms.However, in contrast to URLLC, XR may have a high bit rate.

TABLE 1 Default Maximum Packet Packet Data 5QI Delay Error Burst ValueBudget Rate Volume Example Services 1 100 ms 10⁻² N/A ConversationalVoice 2 150 ms 10⁻³ N/A Conversational Video (Live Streaming) 6, 8, 9300 ms 10⁻⁶ N/A Video (Buffered Streaming) TCP-based (e.g., www, e-mail,chat, ftp, p2p file sharing, progressive video, etc.) . . . . . . . . .. . . . . . 80  10 ms 10⁻⁶ N/A Low Latency eMBB applications AugmentedReality 81   5 ms 10⁻⁵ 160 B Remote control . . . . . . . . . . . . . ..

XR may be used for different applications. XR may involve real andvirtual combined environments and human-machine interactions generatedby computer technology and wearables, for example. As an example, XRcommunication may be used for cloud gaming, virtual reality (VR) splitrendering, and/or augmented reality (AR) split computation. Table 2illustrates a chart showing example uses for XR.

TABLE 2 Cloud VR split AR split Gaming rendering computation HMD/ 5GHead-mounted Head-mounted with Device Smartphone with 5G modemUSB/Bluetooth or Tablet attached connection to ″Puck″ or Smartphone with5G modem. Low power (2W) AR glass 5G usage QOS/OTT QOS QOS LocationOutdoor Enterprise-Indoor, Enterprise-Indoor, Residential-Indoor,Outdoor Outdoor Mobility Static, Limited to head Pedestrian, Hi-speedHi-speed movements and restricted body movements, Hi-speed (VR in atrain, back of a car)

FIG. 4 illustrates an example system model 400 for XR communication overa 5G NR system. FIG. 4 illustrates a head mounted display (HMD) 402 thatmay be worn by a user. The HMD may send and receive XR communicationwith edge server 408 via a 5G communication system 404, e.g., asdescribed in detail in connection with FIG. 1 . The 5G system may alsobe referred to as an NR system. FIG. 4 illustrates the 5G system ascomprising a UE 403 that transmits/receives communication with RAN 405that transmits/receives communication with a network component 407. TheUE may correspond to UE 104 in FIG. 1 , and the core network component407 may correspond to core network 190 in FIG. 1 . The RAN component maycorrespond to a base station 102/180 in FIG. 1 . Thus, the UE 403 mayreceive XR data from the HMD and transmit the XR data to a base station,which may provide the data to the core network 407. The core network 407may interface with the edge server 408 to provide the data to the edgeserver. Similarly, the edge server 408 may provide data to the HMD byproviding the data to the core network 407, which passes the data to abase station that transmits the data as downlink communication to UE403. The UE 403 may provide the received downlink data to the HMD, e.g.,via a wireless or wired connection with the HMD. Thus, 5G system 404 maytransmit and receive traffic with edge server 408 that is illustrated ascomprising an XR edge data network (DN) and an XR edge applicationfunction (AF). As illustrated, the traffic may be communicated using anN5/N33 network external interface and/or an N6 interface between a5GC-UPF and the XR edge DN, e.g., real-time transport protocol(RTP)—user datagram protocol (UDP).

The 5G system 404, or NR system, may provide QoS for the XRcommunication. The XR session may be hosted at the edge server 408,which may be an operator server or a third party server. The latencybetween the core network component 407 and the edge server 408 may beassumed to be negligible. Communication between Hypertext transferprotocol (HTTP) to transport control protocol (TCP) may use latency inthe latency budget for the XR communication.

FIG. 5B illustrates an example graph 550 showing a periodic orquasi-periodic nature of XR traffic. The height of each line indicates afile size of the XR traffic. As illustrated, similar amounts and sizesof data may be communicated in periodic busts of traffic. XR may involveperiodic rendering processes, each within a separate epoch correspondingto a length of time. The HMD may determine and send period bursts ofinformation to the edge server, e.g., position/orientation informationfor the HMD. The edge server may process the position/orientationinformation and provide rendering information back to the HMD.

The 5G system 404, edge server 408 computation, and device computation402 may be based on independent clocks, e.g., a clock at the HMD 402 anda clock at the edge server 408. Thus, computation and communicationmight not be coordinated. FIG. 5A illustrates an example timeline 500for XR without synchronization showing resource contention between twousers. Computation resources and wireless resources (e.g., 5G NRwireless resources) may be dimensioned for reliability at peak loads. Atlow delay budgets, higher resource contention may occur with peakloading, such as illustrated in FIG. 5A.

FIG. 6 provides a diagram 600 illustrating an edge server synchronizedwith a 5G system in accordance with certain aspects of the disclosure.The diagram 600 includes the edge server 602, the 5G network generalizedby box 604 which includes the core network and the RAN, and furtherincludes a plurality of end system devices 606. In some aspects, theedge server and device computation nodes and communication nodes may beconfigured to synchronize their respective clocks. The computations andcommunications may then be scheduled at deterministic times, due to thesynchronization, which may minimize peak loading. At least one advantageof the disclosure is that synchronizing the 5G system and the edgeserver may optimize allocation of downlink and/or uplink resources. Forexample, the base station of the 5G system may schedule uplink resourcesfor UEs to coincide with downlink receptions of the UEs. This may allowUEs to wake up from idle mode in order to transmit and receive duringthe same wake up duration, as opposed to waking up just to transmit, andthen subsequently wake up again in order to receive, or vice versa.

FIGS. 7A-7B illustrate diagrams 700, 750 of an edge server and a 5Gsystem in accordance with certain aspects of the disclosure. The diagram700 includes a 5G system 702 and an edge server 704. The edge server 704may be a server that is located close enough to the 5G network, suchthat latency between the edge server and the 5G network is small andnegligible. Diagrams 700 and 750 disclose different aspects directed toconveying “burst arrival time” information. The “burst arrival time” maybe the arrival time of the data burst at either the ingress of the RAN(e.g., downlink flow direction) or egress interface of the UE (e.g.,uplink flow direction). Providing the burst arrival time assists inachieving the synchronized system. A synchronized system may occur whenthe clocks, for example, of the 5G system and the edge server aresynchronized with respect to each other, or the respective clocks may bysynchronized to a reference clock. As such, the time at which a burst ofdownlink traffic or uplink traffic may arrive may be specified by the 5Gsystem back to the application or edge server, and back to theapplication function.

In some aspects, for example, the edge server 704 of 700 may beconfigured to know the periodicity of the burst of downlink traffic,such that the edge server 704 of 700 may decide the burst arrival time.Periodicity may refer to the time period between the start of twobursts. In some aspects, for example in diagram 750, the edge server 704may be configured to know the periodicity of the burst of downlinktraffic, however, the 5G system 702 of 750 may be configured to decidethe burst arrival time. Thus, the 5G system 702 of 750 may determine theburst arrive time in response to a request from the edge server 704 toserver periodic traffic. In some aspects, UEs that are being served bythe same cell are more likely to be offset than UEs in a different cell.In addition, UEs on non-orthogonal beams may be more likely to be offsetthan UEs on orthogonal beams.

FIGS. 8A-8B illustrate diagrams 800, 850 directed to aligning uplinktransmissions with downlink reception periods in accordance with certainaspects of the disclosure. Diagram 800 provides an example of the age ofpose, which is the time from which a pose is first sampled (e.g., at802) until the pose is rendered (e.g., 804). The rendering epoch 804 isthe time when the downlink computation on the edge server starts, andwhen the pose is actually sent. For example, 802 is the first time thepose was actually sampled on the device (e.g., UE), and the time atwhich the pose was actually sent as an uplink transmission. The notionis that the older the pose, the more stale the pose information is goingto be when the edge server starts its computation. It would beadvantageous to reduce the age of the pose, in order to limit orminimize the staleness of the pose information. In some aspects, the UEmay be configured to utilize the age of the pose or staleness of thepose information in order to capture pose information as close aspossible to the uplink transmission time, because the UE would have anunderstanding of the server side data computation or rendering times.

The uplink transmission will not be sent at a random time, instead, theuplink transmission will be sent at 806, which corresponds to an uplinkslot. 5G has a slot structure wherein each slot has a set of duration,such that typical slot duration of the slot structure may be 0.5 ms(based on numerology) and each of the slots may be downlink only, uplinkonly, or can be a combination of uplink and downlink, which is what isindicated by the letter “S” in the slot structure of FIG. 8A. In thepresent disclosure, uplink transmissions may occur on S slots whichsupports uplink transmission because it has some uplink symbols. The Sslot may include uplink symbols and the U slot may only comprise uplinksymbols, such that uplink transmissions may occur on S or U slots. Insome aspects, the uplink transmission may occur adjacent to a D ordownlink slot where there was traffic allocated to the particular UE.Some D slots may have traffic allocated to the particular UE, but some Dslot may not, because D slots may be shared across multiple users. Ifthere is an allocation of downlink traffic for a particular UE, then theuplink traffic may be transmitted in the subsequent S and U slots,adjacent the D slot, such that the amount of time that the UE has towake up may be reduced. As such, the UE may employ an increased idletime to facilitate transmission and reception of data during the samewake up duration, as shown, for example, in diagram 850 of FIG. 8B.

FIG. 9 is a call flow diagram of signaling between a base station and aUE in accordance with certain aspects of the disclosure. The diagram 900of FIG. 9 includes a UE 902 and a base station 904. The base station 904may be configured to provide a cell. The UE 902 may be configured tocommunicate with the base station 904. For example, in the context ofFIG. 1 , the base station 904 may correspond to base station 102/180and, accordingly, the cell may include a geographic coverage area 110 inwhich communication coverage is provided and/or small cell 102′ having acoverage area 110′. Further, a UE 902 may correspond to at least UE 104.In another example, in the context of FIG. 3 , the base station 904 maycorrespond to base station 310 and the UE 902 may correspond to UE 350.Optional aspects are illustrated with a dashed line.

The UE 902 and base station 904 may communicate using period bursts ofUL data traffic and periodic bursts of DL data traffic. The data trafficmay comprise XR data traffic.

As illustrated at 908, the base station may select an offset time for atleast one of the uplink data traffic or downlink data traffic. The timeoffset may be based on a timing difference between the downlink datatraffic and the uplink data traffic. For example, the time offset foruplink traffic may be relative to the timing of the periodic bursts ofuplink data traffic to increase an overlap of the uplink data trafficwith the downlink data traffic. The time offset for the downlink trafficmay be relative to the timing of the periodic bursts of downlink datatraffic to increase an overlap of the downlink data traffic with theuplink data traffic. The base station may select the offset time to beapplied to at least one of the uplink data traffic or downlink datatraffic to increase an overlap between the uplink traffic bursts and thedownlink traffic bursts. For example, when uplink and downlink trafficburst start times are periodic, the base station may select offsets tothe uplink and downlink traffic, to be conveyed to the AF, to maximizealignment/overlap between UL and DL traffic bursts. For example, ifuplink bursts occur every 4 ms, and downlink bursts occur every 8 ms,when an application starts uplink at 3 ms offset with respect to 0, anddownlink starts with offset 2 ms to 0, the alignment can be maximized bysending an offset of −3 and −2 ms to the uplink and downlinkrespectively. The offset for the UL traffic may be communicated from thebase station 904 to the UE 902.

As illustrated at 910, the base station 904 may configure a DRX cyclefor the UE 902. The base station 904 may configure the DRX cycle for theUE 902 based on a periodicity of traffic arrival for the periodic uplinktraffic bursts and the periodic downlink traffic bursts. The DRX cyclemay be configured based on overall periodicity of uplink and downlinktraffic arrival.

In some aspects, the UL or DL transmissions may be grant-free orperiodic grant transmissions. For example, at 906, the base station maypreconfigure resources for uplink transmissions from the UE 902.

When uplink and downlink traffic burst start times are periodic, and theRAN has allocated resources for grant-free uplink transmission, the RANcan further decide on an offset, at 908, to the downlink traffic tomaximize alignment between uplink transmission resources and downlinktraffic arrival. The DRX cycle may be planned based on overallperiodicity of uplink transmission resources and downlink trafficarrival.

When uplink and downlink traffic burst start times are periodic, and theRAN has allocated resources for grant-free uplink transmission, the RANcan further decide on an offset, at 908, to the downlink traffic and thecorresponding grant-free downlink resource allocation so as to maximizealignment between uplink transmission resources and downlinktransmission resources, e.g., in which the DRX cycle is planned based onoverall periodicity of uplink transmission resources and downlinktransmission resources.

When uplink and downlink traffic burst start times are periodic, and theRAN has allocated resources for grant-free downlink transmission, theRAN can further decide on an offset, at 908, to the uplink traffic so asto maximize alignment between downlink transmission resources and uplinktraffic arrival, e.g., in which the DRX cycle is planned based onoverall periodicity of uplink traffic arrival and downlink transmissionresources.

As illustrated at 912, the UE 902 may determine a processing timelinefor the communication. For example, a processing timeline in XRcommunication may include a plurality of epochs, wherein the applicationserver performs data processing at the conclusion of each epoch, e.g.,as described in connection with FIG. 8B.

As illustrated at 914, for grant-based uplink transmissions, the UE maytransmit an SR to the base station 904 and may receive a grant 916 fromthe base station for the uplink transmission. In some aspects, whenuplink traffic burst start times are periodic, and the uplink isgrant-based, and the RAN has allocated a DRX cycle, the UE can decide todelay sending the SR to the start of next DRX on time. This may applywhen the DRX on time is slightly delayed compared to uplink trafficarrival time. In some aspects, when uplink traffic burst start times areperiodic, and the uplink is grant-based, and the RAN has allocated a DRXcycle, the UE can send the SR at the start of next DRX on time ahead ofuplink traffic arrival. This applies when the DRX on time is slightlyahead of uplink traffic arrival time. In some aspects, when uplinktraffic burst start times are periodic, and the periodicity is notconveyed to the RAN, and the uplink is grant-based, and the RAN hasallocated a DRX cycle, the UE can learn the periodicity of the uplinktraffic and send the SR at the start of next DRX on time ahead of uplinktraffic arrival.

Thus, the 5G system, e.g., 404 illustrated in FIG. 4 , may receive ULand DL traffic periodicities for UL traffic from the HMD 402 and DLtraffic from the edge server 408. The 5G system 404 may send an offsetback to the HMD to maximize UL and DL alignment. The 5G system may alsoconfigure a DRX cycle for the UE, and therefore the HMD, based on the ULand DL traffic periodicities and the alignment based on offsets. Then,the 5G system may receive DL traffic from the edge server and UL trafficfrom the HMD via the UE. The DL traffic may be aligned with a DRX onportion of the DRX cycle configured for the UE. For example, the basestation may hold DL traffic until the UE would be in DRX on. The holdtime may be small, e.g., only accounting for jitter between thesuggested offset and actual traffic arrival. The UL traffic maysimilarly be aligned with the DRX on state of the UE. The 5G system may

UL traffic should be aligned with DRX on. The UE may hold UL trafficuntil the UE would be in DRX on. The hold time may be small, e.g., onlyaccounting for jitter between the suggested offset and actual trafficarrival.

As illustrated at 918, the UE 902 may adjust an uplink traffic burst.The UE 902 may adjust the uplink traffic burst based on the offsetdetermined by the base station at 908. The adjustment to the uplinktraffic burst may help align transmission of uplink data burst(s) withthe processing timeline such that uplink information, e.g., poseinformation, arrive just in time for rendering. The periodicity of thepose update(s) may be reduced to a periodicity of rendered traffic onthe downlink. In some aspects, the uplink traffic may be adjusted toalign the uplink transmission to the downlink reception time in order toprolong an idle time and the UE between the periodic traffic bursts andto save power. Thus, the UE may delay waking up, at 920, until the UE'sDRX on duration.

The UE may receive downlink traffic bursts, at 922, and may transmitperiodic uplink traffic bursts, at 924, based on the adjustment at 918.

FIG. 10 is a flowchart 1000 of a method of wireless communication. Themethod may be performed by a base station or a component of a basestation (e.g., the base station 102, 180, 310, 904; the apparatus 1102;the baseband unit 1104, which may include the memory 376 and which maybe the entire base station 310 or a component of the base station 310,such as the TX processor 316, the RX processor 370, and/or thecontroller/processor 375). One or more of the illustrated operations maybe omitted, transposed, or contemporaneous. Optional aspects areillustrated with a dashed line. The method may allow a base station tobe synchronized with the application server, such that the base stationmay align uplink transmissions of a UE with its downlink receptionperiods, thereby reducing resource consumption as well as powerconsumption.

At 1002, the base station may communicate with a UE. For example, 1002may be performed by reception component 1130 of apparatus 1102. The basestation may communicate with the UE using periodic uplink traffic burstsand periodic downlink traffic bursts. The communication may comprise XRtraffic, as described in connection with FIGS. 4-9 .

At 1004, the base station may select a time offset to at least one ofuplink traffic or downlink traffic. For example, 1004 may be performedby offset component 1140 of apparatus 1102. The base station may selectthe time offset to at least one of the uplink traffic of the downlinktraffic to increase an overlap between the uplink traffic bursts and thedownlink traffic bursts.

At 1006, the base station may send the time offset to an applicationfunction (AF). For example, 1006 may be performed by offset component1140 of apparatus 1102. The base station may send the time offset to theapplication function via transmission component 1106.

In some aspects, for example at 1008, the UE may configure a DRX cyclefor the UE. For example, 1008 may be performed by DRX configurationcomponent 1142 of apparatus 1102. The UE may configure the DRX cycle forthe UE based on a periodicity of traffic arrival for the periodic uplinktraffic bursts and the periodic downlink traffic bursts.

In some aspects, for example at 1010, the base station may allocateresources for grant-free uplink transmission. For example, 1010 may beperformed by allocation component 1144 of apparatus 1102. The timeoffset may be selected to increase an alignment between the resourcesallocated for the grant-free uplink transmission and downlink trafficarrival.

In some aspects, the time offset may be selected to offset the downlinktraffic from the base station to increase an alignment between theresources allocated for the grant-free uplink transmission from a UE anddownlink traffic arrival for the UE. When the base station configuresthe DRX cycle the base station may configure the DRX cycle for the UEbased on a periodicity of the resources allocated for the grant-freeuplink transmission and downlink traffic arrival

In some aspects, the start times for the uplink traffic and the downlinktraffic may be periodic. The time offset to the downlink traffic and thegrant-free downlink resource allocation may be determined in a manner toincrease alignment between uplink transmission resources and downlinktransmission resources. The base station may configure the DRX cycle forthe UE based on a periodicity of uplink transmission resources anddownlink transmission resources.

In some aspects, the time offset determined for the uplink traffic maybe determined to increase alignment between downlink transmissionresources and uplink traffic arrival, e.g., when start times for theuplink traffic and the downlink traffic are periodic. The base stationmay configure the DRX cycle for the UE based on a periodicity of uplinktransmission resources and downlink transmission resources.

In some aspects, for example at 1012, when start times for the uplinktraffic and the downlink traffic are periodic, the base station mayallocate resources for grant-free downlink transmission. For example,1012 may be performed by allocation component 1144 of apparatus 1102.The base station may allocate resources for grant-free downlinktransmission for uplink traffic and downlink traffic that are periodic.The time offset may be determined for the uplink traffic and thegrant-free uplink resource allocation to increase alignment betweenuplink traffic arrival and downlink transmission resources. The basestation may configure the DRX cycle for the UE based on a periodicity ofuplink transmission resources and downlink transmission resources.

In some aspects, the base station may configure a DRX cycle for the UEbased on a periodicity of uplink traffic arrival and downlinktransmission resources. In some aspects, when the start times for theuplink traffic and downlink traffic are periodic, the base station mayallocate resources for grant-free downlink transmission. The basestation may determine the time offset to the uplink traffic and thegrant-free uplink resource allocation to increase alignment betweenuplink transmission resources and downlink transmission resources. Insome aspects, the base station may configure a DRX cycle for the UCbased on a periodicity of uplink transmission resources and downlinktransmission resources.

FIG. 11 is a diagram 1100 illustrating an example of a hardwareimplementation for an apparatus 1102. The apparatus 1102 is a BS andincludes a baseband unit 1104. The baseband unit 1104 may communicatethrough a cellular RF transceiver with the UE 104. The baseband unit1104 may include a computer-readable medium/memory. The baseband unit1104 is responsible for general processing, including the execution ofsoftware stored on the computer-readable medium/memory. The software,when executed by the baseband unit 1104, causes the baseband unit 1104to perform the various functions described supra. The computer-readablemedium/memory may also be used for storing data that is manipulated bythe baseband unit 1104 when executing software. The baseband unit 1104further includes a reception component 1130, a communication manager1132, and a transmission component 1134. The communication manager 1132includes the one or more illustrated components. The components withinthe communication manager 1132 may be stored in the computer-readablemedium/memory and/or configured as hardware within the baseband unit1104. The baseband unit 1104 may be a component of the BS 310 and mayinclude the memory 376 and/or at least one of the TX processor 316, theRX processor 370, and the controller/processor 375.

The communication manager 1132 includes an offset component 1140 thatmay select a time offset to at least one of uplink traffic or downlinktraffic, e.g., as described in connection with 1004 of FIG. 10 . Theoffset component 1140 may send the time offset to an AF, e.g., asdescribed in connection with 1006 of FIG. 10 . The communication manager1132 further includes a DRX configuration component 1142 that mayconfigure a DRX cycle for the UE e.g., as described in connection with1008 of FIG. 10 . The communication manager 1132 further includes anallocation component 1144 that may allocate resources for grant-freeuplink transmission, e.g., as described in connection with 1010 of FIG.10 . The allocation component 1144 may allocate resources for grant-freedownlink transmission, e.g., as described in connection with 1012 ofFIG. 10 . The reception component 1130 of apparatus 1102 may communicatewith the UE, e.g., as described in connection with 1002 of FIG. 10 .

The apparatus may include additional components that perform each of theblocks of the algorithm in the aforementioned flowchart of FIG. 10 . Assuch, each block in the aforementioned flowchart of FIG. 10 may beperformed by a component and the apparatus may include one or more ofthose components. The components may be one or more hardware componentsspecifically configured to carry out the stated processes/algorithm,implemented by a processor configured to perform the statedprocesses/algorithm, stored within a computer-readable medium forimplementation by a processor, or some combination thereof.

In one configuration, the apparatus 1102, and in particular the basebandunit 1104, includes means for communicating with a UE using periodicuplink traffic bursts and periodic downlink traffic bursts. Theapparatus includes means for selecting a time offset to at least one ofuplink traffic or downlink traffic to increase an overlap between theuplink traffic bursts and the downlink traffic bursts. The apparatusincludes means for sending the time offset to an AF. The apparatusfurther includes means for configuring a DRX cycle for the UE based on aperiodicity of traffic arrival for the periodic uplink traffic burstsand the periodic downlink traffic bursts. The apparatus further includesmeans for allocating resources for grant-free uplink transmission,wherein the time offset is selected to increase an alignment between theresources allocated for the grant-free uplink transmission and downlinktraffic arrival. The apparatus further includes means for configuring aDRX cycle for the UE based on a periodicity of the resources allocatedfor the grant-free uplink transmission and downlink traffic arrival. Theapparatus further includes means for allocating resources for grant-freeuplink transmission. The apparatus further includes means fordetermining the time offset to the downlink traffic and the grant-freedownlink resource allocation to increase alignment between uplinktransmission resources and downlink transmission resources. Theapparatus further includes means for configuring a DRX cycle for the UEbased on a periodicity of uplink transmission resources and downlinktransmission resources. The apparatus further includes means forallocating resources for grant-free downlink transmission. The apparatusfurther includes means for determining the time offset for the uplinktraffic to increase alignment between downlink transmission resourcesand uplink traffic arrival. The apparatus further includes means forconfiguring a DRX cycle for the UE based on a periodicity of uplinktraffic arrival and downlink transmission resources. The apparatusfurther includes means for allocating resources for grant-free downlinktransmission. The apparatus further includes means for determining thetime offset to the uplink traffic and the grant-free uplink resourceallocation to increase alignment between uplink transmission resourcesand downlink transmission resources. The apparatus further includesmeans for configuring a DRX cycle for the UE based on a periodicity ofuplink transmission resources and downlink transmission resources. Theaforementioned means may be one or more of the aforementioned componentsof the apparatus 1102 configured to perform the functions recited by theaforementioned means. As described supra, the apparatus 1102 may includethe TX Processor 316, the RX Processor 370, and the controller/processor375. As such, in one configuration, the aforementioned means may be theTX Processor 316, the RX Processor 370, and the controller/processor 375configured to perform the functions recited by the aforementioned means.

FIGS. 12-16 are flowcharts 1200, 1300, 1400, 1500, 1600 of methods ofwireless communication. The methods may be performed by a UE or acomponent of a UE (e.g., the UE 104, 350, 902; the apparatus 1702; thecellular baseband processor 1704, which may include the memory 360 andwhich may be the entire UE 350 or a component of the UE 350, such as theTX processor 368, the RX processor 356, and/or the controller/processor359). One or more of the illustrated operations may be omitted,transposed, or contemporaneous. Optional aspects are illustrated with adashed line. The methods may allow a UE to reduce power consumption byaligning uplink transmissions to downlink receptions, which may allowthe UE to extend its idle time and save power.

At 1202, the UE communicates with a base station. For example, 1202 maybe performed by reception component 1730 and/or transmission component1734 of apparatus 1702. The UE may communicate with the base stationusing periodic uplink traffic bursts and periodic downlink trafficbursts. The communication may comprise XR traffic, e.g., as described inconnection with any of FIGS. 4-9 .

At 1204, the UE may receive a configuration for a DRX cycle based on theperiodic uplink and downlink traffic bursts. For example, 1204 may beperformed by DRX component 1740 of apparatus 1702. Uplink transmissionsfrom the UE may be grant based. Example aspects of configuring a DRXcycle are described in connection with 910 in FIG. 9 . For example, DRXcomponent 1740 of apparatus 1702 may receive the DRX configuration.

At 1206, the UE may delay sending an SR for uplink traffic to abeginning of a next DRX cycle. For example, 1206 may be performed by SRcomponent 1742 of apparatus 1702. The SR may be sent or delayed by SRcomponent 1742 of apparatus 1702.

At 1302, the UE communicates with a base station using periodic uplinktraffic bursts and periodic downlink traffic bursts. For example, 1302may be performed by reception component 1730 or transmission component1734 of apparatus 1702. The communication may comprise XR traffic, e.g.,as described in connection with any of FIGS. 4-9 .

At 1304, the UE may receive a configuration for a DRX cycle based on theperiodic uplink and downlink traffic bursts. For example, 1304 may beperformed by DRX component 1740 of apparatus 1702. The UE's uplinktransmissions may be grant based. Example aspects of configuring a DRXcycle are described in connection with 910 in FIG. 9 .

At 1306, the UE may transmit an SR prior to an arrival of the uplinktraffic when the arrival of uplink traffic burst is expected to arrivewithin the next DRX cycle. For example, 1306 may be performed by SRcomponent 1742 of apparatus 1702. The SR may be sent based on aprediction or estimation that uplink traffic will arrive, e.g., based ona previous pattern of uplink traffic bursts.

At 1402, the UE communicates with a base station using periodic uplinktraffic bursts and periodic downlink traffic bursts. For example, 1302may be performed by reception component 1730 or transmission component1734 of apparatus 1702. The communication may comprise XR traffic, e.g.,as described in connection with any of FIGS. 4-9 . A periodicity ofuplink traffic arrivals might not be conveyed to the UE.

At 1404, the UE determines the periodicity of the uplink traffic. Forexample, 1304 may be performed by determination component 1744 ofapparatus 1702. The UE may determine the periodicity based on a previouspattern of arrival of uplink traffic for transmission to the basestation.

At 1406, the UE may send an SR for the uplink traffic at a beginning ofa next DRX cycle prior to an uplink traffic burst arrival when theuplink traffic burst arrival is expected to arrive within the next DRXcycle. For example, 1406 may be performed by SR component 1742 ofapparatus 1702. The SR may be sent based on a prediction or estimationthat uplink traffic will arrive, e.g., based on a previous pattern ofuplink traffic bursts.

At 1502, the UE communicates with a base station using periodic uplinktraffic bursts and periodic downlink traffic bursts. For example, 1502may be performed by reception component 1730 or transmission component1734 of apparatus 1702. The communication may comprise XR traffic, e.g.,as described in connection with any of FIGS. 4-9 . A periodicity ofuplink traffic arrivals might not be conveyed to the UE.

At 1504, the UE determines the periodicity of the uplink traffic. Forexample, 1504 may be performed by determination component 1744 ofapparatus 1702. The UE may determine the periodicity based on a previouspattern of arrival of uplink traffic for transmission to the basestation.

At 1506, the UE may delay sending an SR for uplink traffic to abeginning of a next DRX cycle. For example 1506 may be performed by SRcomponent 1742 of apparatus 1702.

At 1602, the UE may communicate with a base station using periodicuplink traffic bursts and periodic downlink traffic bursts. For example,1602 may be performed by reception component 1730 or transmissioncomponent 1734 of apparatus 1702. The communication may comprise XRtraffic, e.g., as described in connection with any of FIGS. 4-9 . Aperiodicity of uplink traffic arrivals might not be conveyed to the UE.

At 1604, the UE may select a time offset to at least one of uplinktraffic or downlink traffic. For example, 1604 may be performed byoffset component 1746 of apparatus 1702. The UE may select the timeoffset to at least one of uplink traffic or downlink traffic to increaseoverlap between the uplink traffic bursts and the downlink trafficbursts.

At 1606, the UE may send the time offset to an application client. Forexample, 1606 may be performed by transmission component 1734 ofapparatus 1702.

FIG. 17 is a diagram 1700 illustrating an example of a hardwareimplementation for an apparatus 1702. The apparatus 1702 is a UE andincludes a cellular baseband processor 1704 (also referred to as amodem) coupled to a cellular RF transceiver 1722 and one or moresubscriber identity modules (SIM) cards 1720, an application processor1706 coupled to a secure digital (SD) card 1708 and a screen 1710, aBluetooth module 1712, a wireless local area network (WLAN) module 1714,a Global Positioning System (GPS) module 1716, and a power supply 1718.The cellular baseband processor 1704 communicates through the cellularRF transceiver 1722 with the UE 104 and/or BS 102/180. The cellularbaseband processor 1704 may include a computer-readable medium/memory.The computer-readable medium/memory may be non-transitory. The cellularbaseband processor 1704 is responsible for general processing, includingthe execution of software stored on the computer-readable medium/memory.The software, when executed by the cellular baseband processor 1704,causes the cellular baseband processor 1704 to perform the variousfunctions described supra. The computer-readable medium/memory may alsobe used for storing data that is manipulated by the cellular basebandprocessor 1704 when executing software. The cellular baseband processor1704 further includes a reception component 1730, a communicationmanager 1732, and a transmission component 1734. The communicationmanager 1732 includes the one or more illustrated components. Thecomponents within the communication manager 1732 may be stored in thecomputer-readable medium/memory and/or configured as hardware within thecellular baseband processor 1704. The cellular baseband processor 1704may be a component of the UE 350 and may include the memory 360 and/orat least one of the TX processor 368, the RX processor 356, and thecontroller/processor 359. In one configuration, the apparatus 1702 maybe a modem chip and include just the baseband processor 1704, and inanother configuration, the apparatus 1702 may be the entire UE (e.g.,see 350 of FIG. 3 ) and include the aforediscussed additional modules ofthe apparatus 1702.

The communication manager 1732 includes a DRX component 1740 that isconfigured to configure a DRX cycle based on the periodic uplink anddownlink traffic bursts, e.g., as described in connection with 1204 ofFIG. 12 . The DRX component 1740 is configured to receive aconfiguration for a DRX cycle based on the periodic uplink and downlinktraffic bursts, e.g., as described in connection with 1304 of FIG. 13 .The communication manager 1732 further includes an SR component 1742that is configured to delay sending an SR for uplink traffic to abeginning of a next DRX cycle, e.g., as described in connection with1206 of FIG. 12 . The SR component 1742 may transmit an SR prior to anarrival of the uplink traffic when the arrival of uplink traffic burstis expected to arrive within the next DRX cycle, e.g., as described inconnection with 1306 of FIG. 13 . The SR component 1742 may send an SRfor the uplink traffic at a beginning of a next DRX cycle prior to anuplink traffic burst arrival when the uplink traffic burst arrival isexpected to arrive within the next DRX cycle, e.g., as described inconnection with 1406 of FIG. 14 . The SR component 1742 may delaysending an SR for uplink traffic to a beginning of a next DRX cycle,e.g., as described in connection with 1506 of FIG. 15 . Thecommunication manager 1732 further includes a determination component1744 that is configured to determine the periodicity of the uplinktraffic, e.g., as described in connection with 1404 of FIG. 14 . Thedetermination component 1744 determines the periodicity of the uplinktraffic, e.g., as described in connection with 1504 of FIG. 15 . Thecommunication manager 1732 further includes an offset component 1746that is configured to select a time offset to at least one of uplinktraffic or downlink traffic, e.g., as described in connection with 1604of FIG. 16 . The reception component 1730 or transmission component 1734may be configured to communicate with a base station, e.g., as describedin connection with 1202 of FIG. 12, 1302 of FIG. 13, 1402 of FIG. 14,1502 of FIG. 15 , or 1602 of FIG. 16 . The transmission component 1734may be configured to send a time offset to an application client, e.g.,as described in 1606 of FIG. 16 .

The apparatus may include additional components that perform each of theblocks of the algorithm in the aforementioned flowcharts of FIGS. 12-15. As such, each block in the aforementioned flowcharts of FIGS. 12-15may be performed by a component and the apparatus may include one ormore of those components. The components may be one or more hardwarecomponents specifically configured to carry out the statedprocesses/algorithm, implemented by a processor configured to performthe stated processes/algorithm, stored within a computer-readable mediumfor implementation by a processor, or some combination thereof.

In one configuration, the apparatus 1702, and in particular the cellularbaseband processor 1704, includes means for communicating with a basestation using periodic uplink traffic bursts and periodic downlinktraffic bursts. The apparatus includes means for configuring a DRX cyclebased on the periodic uplink and downlink traffic bursts, wherein uplinktransmission are grant based. The apparatus includes means for delayingsending a scheduling request (SR) for uplink traffic to a beginning of anext DRX cycle. The apparatus includes means for receiving aconfiguration of a DRX cycle based on the periodic uplink and downlinktraffic bursts, wherein uplink transmission are grant based. Theapparatus includes means for transmitting an SR prior to an arrival ofthe uplink traffic when the arrival of uplink traffic burst is expectedto arrive within the next DRX cycle. The apparatus includes means forcommunicating with a base station using periodic uplink traffic burstsand periodic downlink traffic bursts, wherein a periodicity of uplinktraffic arrivals is not conveyed to the UE. The apparatus includes meansfor determining, by the UE, the periodicity of the uplink traffic. Theapparatus includes means for sending a scheduling request (SR) for theuplink traffic at a beginning of a next DRX cycle prior to an uplinktraffic burst arrival when the uplink traffic burst arrival is expectedto arrive within the next DRX cycle. The apparatus includes means fordelaying sending a scheduling request (SR) for the uplink traffic to abeginning of a next DRX cycle. The aforementioned means may be one ormore of the aforementioned components of the apparatus 1702 configuredto perform the functions recited by the aforementioned means. Asdescribed supra, the apparatus 1702 may include the TX Processor 368,the RX Processor 356, and the controller/processor 359. As such, in oneconfiguration, the aforementioned means may be the TX Processor 368, theRX Processor 356, and the controller/processor 359 configured to performthe functions recited by the aforementioned means.

It is understood that the specific order or hierarchy of blocks in theprocesses/flowcharts disclosed is an illustration of example approaches.Based upon design preferences, it is understood that the specific orderor hierarchy of blocks in the processes/flowcharts may be rearranged.Further, some blocks may be combined or omitted. The accompanying methodclaims present elements of the various blocks in a sample order, and arenot meant to be limited to the specific order or hierarchy presented.

The following examples are illustrative only and may be combined withaspects of other embodiments or teachings described herein, withoutlimitation.

Example 1 is a method of wireless communication at a base stationcomprising: communicating with a UE using periodic uplink traffic burstsand periodic downlink traffic bursts; selecting a time offset to atleast one of uplink traffic or downlink traffic to increase an overlapbetween the uplink traffic bursts and the downlink traffic bursts; andsending the time offset to an AF.

In Example 2, the method of claim 1 further includes configuring a DRXcycle for the UE based on a periodicity of traffic arrival for theperiodic uplink traffic bursts and the periodic downlink traffic bursts.

In Example 3, the method of claim 1 or 2 further includes allocatingresources for grant-free uplink transmission, wherein the time offset isselected to increase an alignment between the resources allocated forthe grant-free uplink transmission and downlink traffic arrival.

In Example 4, the method of any of claims 1-3 further includesconfiguring a DRX cycle for the UE based on a periodicity of theresources allocated for the grant-free uplink transmission and downlinktraffic arrival.

In Example 5, the method of any of claims 1-4 further includes that thestart times for the uplink traffic and the downlink traffic areperiodic, the further including allocating resources for grant-freeuplink transmission; and determining the time offset to the downlinktraffic and the grant-free downlink resource allocation to increasealignment between uplink transmission resources and downlinktransmission resources.

In Example 6, the method of any of claims 1-5 further includesconfiguring a DRX cycle for the UE based on a periodicity of uplinktransmission resources and downlink transmission resources.

In Example 7, the method of any of claims 1-6 further includes that thestart times for the uplink traffic and the downlink traffic areperiodic, the method further including: allocating resources forgrant-free downlink transmission; and determining the time offset forthe uplink traffic to increase alignment between downlink transmissionresources and uplink traffic arrival.

In Example 8, the method of any of claims 1-7 further includesconfiguring a DRX cycle for the UE based on a periodicity of uplinktraffic arrival and downlink transmission resources.

In Example 9, the method of any of claims 1-8 further includes that thestart times for the uplink traffic and downlink traffic are periodic,the method further including allocating resources for grant-freedownlink transmission; and determining the time offset to the uplinktraffic and the grant-free uplink resource allocation to increasealignment between uplink transmission resources and downlinktransmission resources.

In Example 10, the method of any of claims 1-9 further includesconfiguring a DRX cycle for the UE based on a periodicity of uplinktransmission resources and downlink transmission resources.

Example 11 is a device including one or more processors and one or morememories in electronic communication with the one or more processorsstoring instructions executable by the one or more processors to causethe system or apparatus to implement a method as in any of Examples1-10.

Example 12 is a system or apparatus including means for implementing amethod or realizing an apparatus as in any of Examples 1-10.

Example 13 is a non-transitory computer readable medium storinginstructions executable by one or more processors to cause the one ormore processors to implement a method as in any of Examples 1-10.

Example 14 is a method of wireless communication at a UE comprisingcommunicating with a base station using periodic uplink traffic burstsand periodic downlink traffic bursts; receiving a configuration of adiscontinuous reception (DRX) cycle based on the periodic uplink anddownlink traffic bursts, wherein uplink transmission are grant based;and delaying sending a scheduling request (SR) for uplink traffic to abeginning of a next DRX cycle.

Example 15 is a device including one or more processors and one or morememories in electronic communication with the one or more processorsstoring instructions executable by the one or more processors to causethe system or apparatus to implement a method as in Example 14.

Example 16 is a system or apparatus including means for implementing amethod or realizing an apparatus as in Example 14.

Example 17 is a non-transitory computer readable medium storinginstructions executable by one or more processors to cause the one ormore processors to implement a method as in Example 14.

Example 18 is a method of wireless communication at a UE comprisingcommunicating with a base station using periodic uplink traffic burstsand periodic downlink traffic bursts; selecting a time offset to atleast one of uplink traffic or downlink traffic to increase overlapbetween the uplink traffic bursts and the downlink traffic bursts; andsending the time offset to an application client.

Example 19 is a device including one or more processors and one or morememories in electronic communication with the one or more processorsstoring instructions executable by the one or more processors to causethe system or apparatus to implement a method as in Example 18.

Example 20 is a system or apparatus including means for implementing amethod or realizing an apparatus as in Example 18.

Example 21 is a non-transitory computer readable medium storinginstructions executable by one or more processors to cause the one ormore processors to implement a method as in Example 18.

The previous description is provided to enable any person skilled in theart to practice the various aspects described herein. Variousmodifications to these aspects will be readily apparent to those skilledin the art, and the generic principles defined herein may be applied toother aspects. Thus, the claims are not intended to be limited to theaspects shown herein, but is to be accorded the full scope consistentwith the language claims, wherein reference to an element in thesingular is not intended to mean “one and only one” unless specificallyso stated, but rather “one or more.” Terms such as “if,” “when,” and“while” should be interpreted to mean “under the condition that” ratherthan imply an immediate temporal relationship or reaction. That is,these phrases, e.g., “when,” do not imply an immediate action inresponse to or during the occurrence of an action, but simply imply thatif a condition is met then an action will occur, but without requiring aspecific or immediate time constraint for the action to occur. The word“exemplary” is used herein to mean “serving as an example, instance, orillustration.” Any aspect described herein as “exemplary” is notnecessarily to be construed as preferred or advantageous over otheraspects. Unless specifically stated otherwise, the term “some” refers toone or more. Combinations such as “at least one of A, B, or C,” “one ormore of A, B, or C,” “at least one of A, B, and C,” “one or more of A,B, and C,” and “A, B, C, or any combination thereof” include anycombination of A, B, and/or C, and may include multiples of A, multiplesof B, or multiples of C. Specifically, combinations such as “at leastone of A, B, or C,” “one or more of A, B, or C,” “at least one of A, B,and C,” “one or more of A, B, and C,” and “A, B, C, or any combinationthereof” may be A only, B only, C only, A and B, A and C, B and C, or Aand B and C, where any such combinations may contain one or more memberor members of A, B, or C. All structural and functional equivalents tothe elements of the various aspects described throughout this disclosurethat are known or later come to be known to those of ordinary skill inthe art are expressly incorporated herein by reference and are intendedto be encompassed by the claims. Moreover, nothing disclosed herein isintended to be dedicated to the public regardless of whether suchdisclosure is explicitly recited in the claims. The words “module,”“mechanism,” “element,” “device,” and the like may not be a substitutefor the word “means.” As such, no claim element is to be construed as ameans plus function unless the element is expressly recited using thephrase “means for.”

What is claimed is:
 1. A method of wireless communication at a networkentity comprising: communicating, at the network entity, using periodicuplink traffic bursts and periodic downlink traffic bursts; selecting,at the network entity, a time offset for at least one of uplink trafficor downlink traffic, wherein the time offset adjusts an alignment in atime domain between the periodic uplink traffic bursts and the periodicdownlink traffic bursts, wherein the periodic uplink traffic bursts andthe periodic downlink traffic bursts are within a same discontinuousreception (DRX) cycle for a user equipment (UE); and sending, from thenetwork entity, the time offset to an application function (AF) of anedge server, the network entity communicating data from the edge serverto the UE within the same DRX cycle for the UE.